package cn.edu.ctbu.datajpa01.service.impl;

import cn.edu.ctbu.datajpa01.domain.Student;
import cn.edu.ctbu.datajpa01.exception.REnum;
import cn.edu.ctbu.datajpa01.exception.RException;
import cn.edu.ctbu.datajpa01.repository.StudentRepository;
import cn.edu.ctbu.datajpa01.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class StudentImplService implements StudentService {

    @Autowired
    private StudentRepository studentRepository;

//    public Student findByNameAndPassword1(String name, String password) throws Exception{
//        List<Student> byNameAndPassword= studentRepository.findByNameAndPassword(name,password);
//        if(byNameAndPassword.size()>0){
//            return byNameAndPassword.get(0);
//        }else{
//            throw new RException(REnum.LOGIN_ERR);
//        }
//
//    }


    public List<Student> findByNameAndPassword(String name,String password){
        return studentRepository.findByNameAndPassword(name,password);
    }
    public List<Student> findAll(){

        return studentRepository.findAll();
    }
    @Override
    public Page<Student> findAll(Pageable pageable) {
        return studentRepository.findAll(pageable);
    }

    /**
     * 分页 带过滤的查询
     * @param  pageable
     * @return
     * */
    public Page<Student> findAll(Example<Student> student, Pageable pageable){
        return  studentRepository.findAll(student,pageable);
    }

    /**
     * 按id进行查询
     * @param id 主键，整数
     * @return
     */
    public Student findById(Integer id){


        return studentRepository.findById(id).orElse(null);
    }

    /**
     * 按名字进行查询,like操作
     * @param name
     * @return
     */
    public List<Student> findByName(String name){


        return studentRepository.findByName(name);
    }


//    /**
//     * 按名字和密码进行查询
//     * @param name
//     * @param password
//     * @return
//     */
//    public List<Student> findByNameAndPassword(String name,String password){
//
//
//        return studentRepository.findByNameAndPassword(name,password);
//    }

    /**
     * 插入
     * @param student
     * @return
     */
    public Student insert(Student student){
        studentRepository.save(student);
        return student;
    }

    /**
     * 更新
     * @param student
     * @return
     */
    public Student update(Student student){
        studentRepository.save(student);
        return student;
    }

    /**
     * 删除
     * @param id
     */
    public void delete(Integer id){
        studentRepository.deleteById(id);
    }

    /**
     * 删除
     * @param id
     */
    public void delete2(Integer id){
        Student student=new Student();
        student.setId(id);
        studentRepository.delete(student);
    }



}